Cleaning composition for granite, stone, etc



Patented Feb. 23, 1926.

UNITED STATES PATENTHOFFICE.

GUSTAF A. NELSON, or NEW YORK, N. Y.

CLEANING COMPOSITION FOR GRANITE, STONE, ETC.

No Drawing.

. filed September 9, 1924. Serial No. 736,790.

To all whom it may concern: 7

Be it known that I, GUs'rAr A. NELSON,

citizen of the United States, and resident of New York, in the county of New'York and State of New York, have invented certain new and useful Improvements in a Cleaning Composition for Granite, Stone, Etc, of which the following is a specification.

This invention relates to composition of matter in general and particularly to a cleansing compound for stone, marble, tile and similar material as described and claimed in my co-pending application filed June 12, 1923, Serial No. 644,944: for composition matter, and of which the present case is a division.

The objectof my invention is to provide a simple, effective and inexpensive composition for cleaning tombstones, granite aces of buildings and marble and stone articles of various kinds, and tile, which may be readily prepared and applied, and which will be very effective in cleansing and bleaching such articles.

\Vhile I have made various experiments, the most effective composition I have found comprises a composition comprising technical ammonium fluoride, hydro-chloride, mixed with a certain portion of oxalic acid and carbonate of sodium, which ingredients when compounded in proper proportions are mixed with a certain quantity of water and are applied to the surface to be cleaned or bleached.

I have found that very good results are also obtainable when the carbonate of sodium is omitted and a composition of ammonium fluoride and-oxalic acid is employed.

The were found to be obtainable by mixing 95% technical ammonium fluoride with 570' surface;

best results in the latter composition Original application filed June 12, 1923, Serial No. M4344. Divided and this application oxalic acid to the quantity of about one and i a half pounds, which is mixed with approximately one gallon of water.

When carbonate of sodium is employed the composition is about as follows,75%

technical ammonium fluoride, 10% oxalic acid, 15% carbonate of sodium, mixed to the weight of about one and ahalf'pounds, which is dissolved in one gallon of water.

This composition is applied to the surface of the article to be cleansed and permitted-to adhere thereto and then, washed off with pure water. a

It is preferable, when applying the composition to rub the surface with either a rag saturated with the compound or with a brush, so as to reach the crevices in the In order to give the surface of the cleaned article a, glossyappearanc e, the same may be smoothedwith pulverized pumice stone or any other polishing material. Hereafter the composition may be again applied and rinsed with water. a s

This cleansing process may be repeated until the desired degree of bleaching is ob tained.

"While I have mentioned a certain propoi tion of each ingredient, be it understood that such proportions may be varied when stronger or weaker compounds are desired.

Having thus described my invention, I claim: I

A composition matter for cleaning granite, stone, marble, tile, etc, comprising 75% ammonium fluoride, 10% oxalicacid 15% carbonate of sodium, compounded to about the weight of one and a half pounds, and

mixed with about one gallon of water.

Signed at New York in the county of New York and State: of New YorkthisQ-ird day of August A. D. 1924.

GUSTAF A. NELSON. 

